• Olof Johansson's avatar
    [POWERPC] pasemi: Implement NMI support · f365355e
    Olof Johansson authored
    Some PWRficient-based boards have a NMI button that's wired up to a GPIO
    as interrupt source. By configuring the openpic accordingly, these get
    delivered as a machine check with high priority, instead of as an external
    interrupt.
    
    The device tree contains a property "nmi-source" in the openpic node
    for these systems, and it's the (hwirq) source for the input.
    
    Also, for these interrupts, the IACK is read from another register than
    the regular (MCACK instead), but they are EOI'd as usual. So implement
    said function for the mpic driver.
    
    Finally, move a couple of external function defines to include/ instead
    of local under sysdev. Being able to mask/unmask and eoi directly saves
    us from setting up a dummy irq handler that will never be called.
    Signed-off-by: default avatarOlof Johansson <olof@lixom.net>
    f365355e
mpic.h 1.22 KB